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<p align="center"><img src="scripts/data/logo/logo_1.svg"></p>
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master branch
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<a href="https://github.com/doctest/doctest/actions?query=branch%3Amaster"><img src="https://github.com/doctest/doctest/workflows/CI/badge.svg?branch=master"></a>
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<a href="https://app.codecov.io/gh/doctest/doctest/branch/master"><img src="https://codecov.io/gh/doctest/doctest/branch/master/graph/badge.svg?token=fAdZl67WN7"/></a>
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dev branch
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<a href="https://github.com/doctest/doctest/actions?query=branch%3Adev"><img src="https://github.com/doctest/doctest/workflows/CI/badge.svg?branch=dev"></a>
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<a href="https://app.codecov.io/gh/doctest/doctest/branch/dev"><img src="https://codecov.io/gh/doctest/doctest/branch/dev/graph/badge.svg?token=fAdZl67WN7"/></a>
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**doctest** is a new C++ testing framework but is by far the fastest both in compile times (by [**orders of magnitude**](doc/markdown/benchmarks.md)) and runtime compared to other feature-rich alternatives. It brings the ability of compiled languages such as [**D**](https://dlang.org/spec/unittest.html) / [**Rust**](https://doc.rust-lang.org/book/second-edition/ch11-00-testing.html) / [**Nim**](https://nim-lang.org/docs/unittest.html) to have tests written directly in the production code thanks to a fast, transparent and flexible test runner with a clean interface.
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[](https://en.wikipedia.org/wiki/C%2B%2B#Standardization)
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[](https://opensource.org/licenses/MIT)
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[](https://raw.githubusercontent.com/doctest/doctest/master/doctest/doctest.h)
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[](https://bestpractices.coreinfrastructure.org/projects/503)
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[](https://discord.gg/PGXn9YmyF3)
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[](https://godbolt.org/z/4s389Kbfs)
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<!--
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[](https://isocpp.org/)
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[](https://github.com/doctest/doctest/blob/master/doc/markdown/readme.md#reference)
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-->
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[<img src="https://c5.patreon.com/external/logo/become_a_patron_button.png" align="right">](https://www.patreon.com/onqtam)
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The framework is and will stay free but needs your support to sustain its development. There are lots of <a href="https://github.com/doctest/doctest/issues/600"><b>new features</b></a> and maintenance to do. If you work for a company using **doctest** or have the means to do so, please consider financial support. Monthly donations via Patreon and one-offs via PayPal.
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[<img src="https://raw.githubusercontent.com/aha999/DonateButtons/master/paypal-donate-icon-7.png" width=100 align="right">](https://www.paypal.me/onqtam/10)
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A complete example with a self-registering test that compiles to an executable looks like this:
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There are many C++ testing frameworks - [Catch](https://github.com/catchorg/Catch2), [Boost.Test](http://www.boost.org/doc/libs/1_64_0/libs/test/doc/html/index.html), [UnitTest++](https://github.com/unittest-cpp/unittest-cpp), [cpputest](https://github.com/cpputest/cpputest), [googletest](https://github.com/google/googletest) and [others](https://en.wikipedia.org/wiki/List_of_unit_testing_frameworks#C.2B.2B).
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The **key** differences between it and other testing frameworks are that it is light and unintrusive:
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- Ultra light on compile times both in terms of [**including the header**](doc/markdown/benchmarks.md#cost-of-including-the-header) and writing [**thousands of asserts**](doc/markdown/benchmarks.md#cost-of-an-assertion-macro)
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- Doesn't produce any warnings even on the [**most aggressive**](scripts/cmake/common.cmake#L84) warning levels for **MSVC**/**GCC**/**Clang**
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- Can remove **everything** testing-related from the binary with the [**```DOCTEST_CONFIG_DISABLE```**](doc/markdown/configuration.md#doctest_config_disable) identifier
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- [**thread-safe**](doc/markdown/faq.md#is-doctest-thread-aware) - asserts can be used from multiple threads spawned from a single test case - [**example**](examples/all_features/concurrency.cpp)
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- asserts can be used [**outside of a testing context**](doc/markdown/assertions.md#using-asserts-out-of-a-testing-context) - as a general purpose assert library - [**example**](examples/all_features/asserts_used_outside_of_tests.cpp)
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- No global namespace pollution (everything is in ```doctest::```) & doesn't drag **any** headers with it
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- [**Portable**](doc/markdown/features.md#extremely-portable) C++11 (use tag [**1.2.9**](https://github.com/doctest/doctest/tree/1.2.9) for C++98) with over 100 different CI builds (static analysis, sanitizers..)
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- binaries (exe/dll) can use the test runner of another binary => tests in a single registry - [**example**](examples/executable_dll_and_plugin/)
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This allows the framework to be used in more ways than any other - tests can be written directly in the production code!
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*Tests can be a form of documentation and should be able to reside near the production code which they test.*
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- This makes the barrier for writing tests **much lower** - you don't have to: **1)** make a separate source file **2)** include a bunch of stuff in it **3)** add it to the build system and **4)** add it to source control - You can just write the tests for a class or a piece of functionality at the bottom of its source file - or even header file!
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- Tests in the production code can be thought of as documentation/up-to-date comments - showcasing the APIs
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- Testing internals that are not exposed through the public API and headers is no longer a mind-bending exercise
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- [**Test-driven development**](https://en.wikipedia.org/wiki/Test-driven_development) in C++ has never been easier!
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The framework can be used just like any other without mixing production code and tests - check out the [**features**](doc/markdown/features.md).
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**doctest** is modeled after [**Catch**](https://github.com/catchorg/Catch2) and some parts of the code have been taken directly - check out [**the differences**](doc/markdown/faq.md#how-is-doctest-different-from-catch).
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[This table](https://github.com/martinmoene/catch-lest-other-comparison) compares **doctest** / [**Catch**](https://github.com/catchorg/Catch2) / [**lest**](https://github.com/martinmoene/lest) which are all very similar.
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Checkout the [**CppCon 2017 talk**](https://cppcon2017.sched.com/event/BgsI/mix-tests-and-production-code-with-doctest-implementing-and-using-the-fastest-modern-c-testing-framework) on [**YouTube**](https://www.youtube.com/watch?v=eH1CxEC29l8) to get a better understanding of how the framework works and read about how to use it in [**the JetBrains article**](https://blog.jetbrains.com/rscpp/better-ways-testing-with-doctest/) - highlighting the unique aspects of the framework! On a short description on how to use the framework along production code you could refer to [**this GitHub issue**](https://github.com/doctest/doctest/issues/252). There is also an [**older article**](https://accu.org/var/uploads/journals/Overload137.pdf) in the february edition of ACCU Overload 2017.
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[](https://www.youtube.com/watch?v=eH1CxEC29l8)
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Documentation
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-------------
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Project:
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- [Features and design goals](doc/markdown/features.md) - the complete list of features
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- [Community driven roadmap](https://github.com/doctest/doctest/issues/600) - upcoming features
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- [Benchmarks](doc/markdown/benchmarks.md) - compile-time and runtime supremacy
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- [Contributing](CONTRIBUTING.md) - how to make a proper pull request
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- [Changelog](CHANGELOG.md) - generated changelog based on closed issues/PRs
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Usage:
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- [Tutorial](doc/markdown/tutorial.md) - make sure you have read it before the other parts of the documentation
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- [Assertion macros](doc/markdown/assertions.md)
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- [Test cases, subcases and test fixtures](doc/markdown/testcases.md)
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- [Parameterized test cases](doc/markdown/parameterized-tests.md)
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- [Command line](doc/markdown/commandline.md)
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- [Logging macros](doc/markdown/logging.md)
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- [```main()``` entry point](doc/markdown/main.md)
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- [Configuration](doc/markdown/configuration.md)
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- [String conversions](doc/markdown/stringification.md)
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- [Reporters](doc/markdown/reporters.md)
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- [Extensions](doc/markdown/extensions.md)
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- [FAQ](doc/markdown/faq.md)
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- [Build systems](doc/markdown/build-systems.md)
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- [Examples](examples)
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Contributing
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------------
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[<img src="https://c5.patreon.com/external/logo/become_a_patron_button.png" align="right">](https://www.patreon.com/onqtam)
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Support the development of the project with donations! There is a list of planned features which are all important and big - see the [**roadmap**](https://github.com/doctest/doctest/issues/600).
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[<img src="https://raw.githubusercontent.com/aha999/DonateButtons/master/paypal-donate-icon-7.png" width=100 align="right">](https://www.paypal.me/onqtam/10)
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If you work for a company using **doctest** or have the means to do so, please consider financial support.
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Contributions in the form of issues and pull requests are welcome as well - check out the [**Contributing**](CONTRIBUTING.md) page.
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Stargazers over time
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------------
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[](https://starchart.cc/doctest/doctest)
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Logo
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------------
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The [logo](scripts/data/logo) is licensed under a Creative Commons Attribution 4.0 International License. Copyright © 2019 [area55git](https://github.com/area55git) [](https://creativecommons.org/licenses/by/4.0/)
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